The most common garbage disposal size in the U.S. is 1/2 horsepower. This size is ideal for households with three or fewer people or those that don't produce much food waste. Although 1/2 horsepower can't handle the typical food waste load for a household of four (which is about 250 pounds of food waste annually) as effectively as 3/4 horsepower, it remains the most common size of garbage disposal on the market.

As with many appliances, proper maintenance is key to maximizing your garbage disposal’s life span. If everyone in your household is on board with proper care and maintenance, like running water while operating the disposal, you should get plenty of years out of your unit. Avoid putting the wrong food items down the disposal, including pasta, rice, bread, and more.

Garbage disposals can be considered bad for the environment due to their electricity usage, but good for the environment because they reduce the food waste sent to landfills. If everyone used a garbage disposal, it would tax the wastewater treatment facilities in that region, but if we had to choose one of the options, we’d say they are a net positive on the environment when used correctly. 

These appliances do unscrew, but you need to disconnect everything properly when you replace your garbage disposal. Make sure you shut the power off to the area first and check that it’s off with a voltage detector. Disconnect the main drain line and P-trap, and then disconnect the dishwasher drain line if you have one connected. You can then unscrew your garbage disposal using a disposal wrench. Just make sure you disconnect the electrical lines before removing your appliance.